Tyra Banks welcomes baby boy

Tyra Banks has welcomed her first child, a baby boy named York. Photo / AP

Supermodel and reality TV queen Tyra Banks has announced she is a mother, welcoming a baby boy named York, born via surrogate.

Posting a photo of a baby's beanie on Instagram, Banks wrote of her joy at finally becoming a mother, much to the surprise of her fans and media.

"The best present we worked and prayed so hard for is finally here. He';s got my fingers and big eyes and his daddy Erik's mouth and chin. As we thank the angel of a woman that carried our miracle baby boy for us, we pray for everyone who struggles to reach this joyous milestone. York Banks Asla, welcome to the world."

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The best present we worked and prayed so hard for is finally here. He's got my fingers and big eyes and his daddy Erik's mouth and chin. As we thank the angel of a woman that carried our miracle baby boy for us, we pray for everyone who struggles to reach this joyous milestone. York Banks Asla, welcome to the world.

A post shared by Tyra Banks (@tyrabanks) on Jan 27, 2016 at 5:16pm PST

The America's Next Top Model host has previously opened up about her fertility struggle, telling People magazine she underwent IVF before turning to surrogacy.

"I've had some not happy moments with that, very traumatic moments," she said in an interview last year. "It's difficult as you get older. It's not something that can just happen."

The 42-year-old is said to want more children, telling People: "I don't just want one child. I want a litter!"